1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb729e9c169329d9a195c3a6c79371ce64367ff13db971a1243fd369293d2164. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d3e4600-44f0-45cc-8c5b-a0481c4f71e3.json and https://artists.proofprofile.net/proofs/artist/0d3e4600-44f0-45cc-8c5b-a0481c4f71e3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
María (feat. Walter Ríos & Ricardo Domínguez)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b27f99ef823db2a3bff72baa66207b5b77e2938143ec85ee541a84bacd68bd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARG601011871.
Malena (feat. Walter Ríos & Ricardo Domínguez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cedff824dfda715a74cdb117407be6e2ba810b78a64fa5c45ce63e92a759136. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARG601011873.
Milonga del 900 (feat. Walter Ríos & Ricardo Domínguez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7767623a5753fb6cb9aaf8732babd7c25378c154fc02b6b02b214285ae41c7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARG601011875.
Rebeldía (feat. Walter Ríos & Ricardo Domínguez)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23349157be6eeba5527b0c64273b7bccbce23256d60225616c9a9f4ddcc9bf84. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ARG601011877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeabc2cb1f992ae61f9f218e90ae97064269c6e473bee330521296cea1eae99a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37887ebf6ab8c2f8d44e15eb2280e9de56b1e419508ff4af131ea52dacfc0261. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6f8628c26a34a440b586c508495b32c7b416d29aff86631d5a530f523cea5d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75120445ffef6a5780bb315e5af011e2004d25ee85bdd8c477b02beb566e3bf1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306971.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972923c939285587fe5dd7e3af257dc5b0fdaa8899153f9f2d84511265366a51. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc13d507827d6c50877cccefcbddca2607cc0bd32e68247de41b40629f650f1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3501cd1bc5bcb9b8f41ac5df7891ee1de8be8843f0ed2eb596671fd0ed668593. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb890c82ad96b8ef25319d5b5089fcd173c948de4ae30edff985c167dd176d318. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123aa3fe2a4531aa9b2ca5190488fbe09f99a6bb2a3bde15b8410d56373923f9. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563ef97bed441ce6ee3babddf1b023647f10252f3f24c1a8379ec980b6f34f71. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA560306979.